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After meeting with Chinese officials Friday, Glyn Davies, the U.S. envoy for North Korea, said a nuclear test would set back efforts to restart regional talks on the North’s nuclear disarmament.

North Korea has accused the U.S. and South Korea of leading the push for the U.N. Security Council resolution.

Sunday’s KCNA dispatch said the U.N. punishment indicates U.S. hostility toward North Korea has reached its highest point. North Korea warned South Korea on Friday of “strong physical countermeasures” if Seoul takes part in the U.N. sanctions.

Japan on Sunday launched two intelligence satellites into orbit amid concerns about North Korea’s threats to conduct more rocket launches and a nuclear test.

The launch was in the planning stages long before the ongoing tensions with North Korea, but it underscores Japan’s longstanding wariness of its neighbor’s abilities and intentions. Japan began its intelligence satellite program after North Korea fired a long-range missile over Japan’s main island in 1998.

• Associated Press writer Eric Talmadge contributed to this article from Tokyo.